Effects of source and concentration of neutral detergent fiber from roughage in beef cattle diets: Comparison of methods to measure the effectiveness of fiber - Goulart, Rodrigo Silva; Vieira, Ricardo A. M; Daniel, Joao L. P; Amaral, Rafael C; Santos, Vanessa P; Toledo Filho, Sergio Gil de; Cabezas-Garcia, Edward H; Tedeschi, Luis O; Nussio, Luiz Gustavo (Journal of Animal Science, 2020)